Viewing Camtasia videos using anonymous proxy

How can someone view Camtasia videos on webpages when using anonymous proxy like hidemyass*com

Here is what happens:
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The Camtasia Studio video content presented here requires JavaScript to be enabled and the latest version of the Macromedia Flash Player. If you are you using a browser with JavaScript disabled please enable it now.
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Thanks.

Use a proxy that allows/enables Javascript?

I use an*ony*m.to and when I have the new URL I make a search with Y*ah*oo.
Could anyone tell me if this is a really smart idea?

I use a Socks5 on my browser.

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